/* ================================================
   senggack.org — playful + scholarly think-folio
   Palette: navy-metallic
   ================================================ */

:root {
    --deep-navy: #0D1B2A;
    --steel-blue: #1B3A5C;
    --metallic-silver: #A0B0C0;
    --bright-teal: #4ECDC4;
    --burnished-gold: #D4A574;
    --chalk-white: #F0EFF4;
    --slate-mist: #2A3F54;

    --font-kr-display: "Black Han Sans", sans-serif;
    --font-lt-display: "Zilla Slab", serif;
    --font-statement: "Merriweather", Georgia, serif;
    --font-question: "Nunito Sans", "Segoe UI", sans-serif;
    --font-definition: "Fira Code", "SFMono-Regular", Menlo, monospace;

    --ease-magnet: cubic-bezier(0.16, 1, 0.3, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--deep-navy);
    color: var(--metallic-silver);
    font-family: var(--font-statement);
    font-size: 16px;
    line-height: 1.76;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ================================================
   FOLIO — common layout
   ================================================ */

.folio {
    position: relative;
    width: 100%;
    padding: 7vh 6vw;
    min-height: 100vh;
}

.folio-header {
    max-width: 900px;
    margin: 0 auto 4rem;
    padding-top: 2rem;
}

.folio-index {
    display: inline-block;
    font-family: var(--font-definition);
    font-size: 0.85rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--burnished-gold);
    padding-bottom: 0.4rem;
    border-bottom: 1px solid var(--slate-mist);
    margin-bottom: 1.4rem;
}

.folio-title {
    font-family: var(--font-lt-display);
    font-weight: 700;
    font-size: clamp(2.5rem, 5.5vw, 4.5rem);
    line-height: 1.05;
    color: var(--chalk-white);
    display: flex;
    align-items: center;
    gap: 0.8rem;
    flex-wrap: wrap;
    margin-bottom: 0.6rem;
}

.folio-subtitle {
    font-family: var(--font-lt-display);
    font-weight: 400;
    font-style: italic;
    font-size: clamp(1.1rem, 1.8vw, 1.6rem);
    color: var(--metallic-silver);
    letter-spacing: 0.01em;
}

.heading-compass {
    width: 0.9em;
    height: 0.9em;
    flex-shrink: 0;
    animation: spin-slow 36s linear infinite;
}

/* ================================================
   MULTI-VOICE TYPOGRAPHY
   ================================================ */

.voice-statement {
    font-family: var(--font-statement);
    font-weight: 400;
    color: var(--chalk-white);
    display: inline;
    padding-left: 0.1em;
    border-left: 2px solid transparent;
}

.voice-question {
    font-family: var(--font-question);
    font-weight: 400;
    color: var(--bright-teal);
    display: inline;
    font-size: 1.02em;
}

.voice-definition {
    font-family: var(--font-definition);
    font-weight: 400;
    color: var(--burnished-gold);
    font-size: 0.94em;
    letter-spacing: -0.01em;
    display: inline;
}

/* ================================================
   FOLIO I — THE INVITATION
   ================================================ */

.folio-invitation {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        radial-gradient(ellipse at 50% 40%, rgba(27, 58, 92, 0.6) 0%, var(--deep-navy) 65%),
        var(--deep-navy);
    padding: 3vh 6vw;
    overflow: hidden;
}

.invitation-inner {
    width: 100%;
    max-width: 1100px;
    text-align: center;
    position: relative;
}

.gak-wrap {
    position: relative;
    display: inline-block;
    line-height: 0.85;
    margin-bottom: 2.2rem;
}

.gak-char {
    font-family: var(--font-kr-display);
    font-weight: 400;
    font-size: clamp(8rem, 25vw, 20rem);
    color: var(--chalk-white);
    display: inline-block;
    line-height: 0.85;
    text-shadow:
        0 0 60px rgba(78, 205, 196, 0.12),
        0 0 120px rgba(27, 58, 92, 0.4);
    background: linear-gradient(180deg, var(--chalk-white) 0%, var(--metallic-silver) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: breathe 9s ease-in-out infinite;
}

.gak-curve {
    position: absolute;
    left: -8%;
    right: -8%;
    bottom: -4%;
    width: 116%;
    height: 60px;
    opacity: 0.7;
}

.invitation-subtitle {
    font-family: var(--font-lt-display);
    font-size: clamp(1.2rem, 2.4vw, 2rem);
    font-weight: 700;
    color: var(--chalk-white);
    margin: 1.4rem auto 1rem;
    max-width: 720px;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.subtitle-kicker {
    font-family: var(--font-definition);
    font-size: 0.7em;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    color: var(--burnished-gold);
    font-weight: 500;
}

.subtitle-main {
    font-style: italic;
    font-weight: 400;
    color: var(--chalk-white);
}

.invitation-meta {
    max-width: 620px;
    margin: 1.2rem auto 0;
    font-size: clamp(0.95rem, 1.1vw, 1.08rem);
    line-height: 1.76;
}

.invitation-meta .voice-definition,
.invitation-meta .voice-statement {
    display: inline;
    margin-right: 0.5em;
}

.invitation-scroll-hint {
    position: absolute;
    bottom: -6vh;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-definition);
    font-size: 0.75rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--metallic-silver);
    opacity: 0.75;
}

.scroll-arrow {
    font-size: 1.2rem;
    color: var(--bright-teal);
    animation: bob 2.4s ease-in-out infinite;
}

/* ================================================
   FOLIO II — THE COLLAGE WALL
   ================================================ */

.folio-collage {
    background:
        linear-gradient(180deg, var(--deep-navy) 0%, #0f2036 100%);
    padding-bottom: 10vh;
}

.collage-container {
    position: relative;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    height: 780px;
}

.collage-card {
    position: absolute;
    background: var(--steel-blue);
    border: 1px solid var(--metallic-silver);
    box-shadow: 2px 4px 12px rgba(0, 0, 0, 0.2);
    padding: 1.4rem 1.4rem;
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
    color: var(--chalk-white);
    transition: transform 500ms var(--ease-magnet), box-shadow 500ms var(--ease-magnet);
    overflow: hidden;
}

.collage-card:nth-child(odd) {
    background: linear-gradient(140deg, var(--steel-blue) 0%, #244972 100%);
}

.collage-card[style*="z-index:5"],
.collage-card[style*="z-index:6"] {
    box-shadow: 6px 10px 28px rgba(0, 0, 0, 0.35);
}

.collage-card:hover {
    box-shadow: 8px 14px 36px rgba(0, 0, 0, 0.45);
    z-index: 20 !important;
}

.card-tag {
    font-family: var(--font-definition);
    font-size: 0.7rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--burnished-gold);
    padding-bottom: 0.3rem;
    border-bottom: 1px dashed var(--slate-mist);
}

.card-footer {
    margin-top: auto;
    font-family: var(--font-definition);
    font-size: 0.68rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--metallic-silver);
    opacity: 0.75;
}

.card-caption {
    margin-top: auto;
    font-size: 0.8rem;
    color: var(--burnished-gold);
}

.card-display {
    font-family: var(--font-lt-display);
    font-weight: 700;
    font-size: clamp(1.6rem, 3.2vw, 2.8rem);
    line-height: 1.05;
    color: var(--chalk-white);
    display: block;
}

.card-display.accent {
    font-style: italic;
    font-weight: 400;
    color: var(--bright-teal);
}

.card-square .card-display {
    font-family: var(--font-kr-display);
    font-size: clamp(2.8rem, 6vw, 5rem);
    color: var(--chalk-white);
    line-height: 1;
}

.card-illustration {
    width: 100%;
    max-width: 220px;
    height: auto;
    margin: 0 auto;
}

.card-illustration-tall {
    max-height: 140px;
}

.collage-card p {
    font-size: 0.95rem;
    line-height: 1.6;
}

.collage-card .voice-statement {
    font-family: var(--font-statement);
    color: var(--chalk-white);
    display: block;
}

.collage-card .voice-question {
    font-family: var(--font-question);
    color: var(--bright-teal);
    display: block;
}

.collage-card .voice-definition {
    font-family: var(--font-definition);
    color: var(--burnished-gold);
    display: block;
}

.separator-wave {
    display: block;
    width: 100%;
    height: 80px;
    margin-top: 6rem;
    opacity: 0.8;
}

/* ================================================
   FOLIO III — THE CONVERSATION
   ================================================ */

.folio-conversation {
    background: var(--deep-navy);
    padding-bottom: 10vh;
}

.conversation-body {
    max-width: 780px;
    margin: 0 auto;
}

.conversation-para {
    margin-bottom: 2.6rem;
    font-size: clamp(0.95rem, 1.1vw, 1.08rem);
    line-height: 1.76;
    position: relative;
    padding-left: 1.2rem;
    border-left: 2px solid var(--slate-mist);
}

.conversation-para .voice-statement,
.conversation-para .voice-question,
.conversation-para .voice-definition {
    display: block;
    margin-bottom: 0.9rem;
    padding-left: 0.2rem;
}

.conversation-para .voice-statement {
    border-left: 2px solid var(--chalk-white);
    padding-left: 0.8rem;
    margin-left: -0.2rem;
}

.conversation-para .voice-question {
    border-left: 2px solid var(--bright-teal);
    padding-left: 0.8rem;
    margin-left: -0.2rem;
}

.conversation-para .voice-definition {
    border-left: 2px solid var(--burnished-gold);
    padding-left: 0.8rem;
    margin-left: -0.2rem;
}

.conversation-signoff {
    margin-top: 3rem;
    text-align: right;
    font-style: italic;
    color: var(--metallic-silver);
}

/* ================================================
   FOLIO IV — THE COMPASS
   ================================================ */

.folio-compass {
    background:
        radial-gradient(ellipse at 50% 55%, rgba(27, 58, 92, 0.7) 0%, var(--deep-navy) 70%),
        var(--deep-navy);
    padding-bottom: 8vh;
    text-align: center;
}

.folio-compass .folio-header {
    text-align: left;
}

.compass-stage {
    position: relative;
    width: min(620px, 86vw);
    height: min(620px, 86vw);
    margin: 4rem auto 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.compass-rings {
    position: relative;
    width: 100%;
    height: 100%;
}

.compass-ring {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    transform-origin: center;
}

.compass-ring-outer {
    animation: spin-cw 60s linear infinite;
}

.compass-ring-inner {
    animation: spin-ccw 45s linear infinite;
}

.ring-text {
    font-family: var(--font-definition);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    fill: var(--metallic-silver);
}

.ring-text-outer {
    font-size: 18px;
    fill: var(--burnished-gold);
}

.ring-text-inner {
    font-size: 14px;
    fill: var(--bright-teal);
}

.compass-rose {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 52%;
    height: 52%;
    transform: translate(-50%, -50%);
    animation: spin-slow 120s linear infinite;
}

.compass-label {
    font-family: var(--font-definition);
    font-size: 14px;
    fill: var(--chalk-white);
    letter-spacing: 0.15em;
}

.compass-legend {
    max-width: 560px;
    margin: 1rem auto 0;
    font-size: clamp(0.88rem, 1vw, 1rem);
    color: var(--metallic-silver);
}

.colophon {
    max-width: 640px;
    margin: 4rem auto 0;
    padding-top: 2rem;
    border-top: 1px solid var(--slate-mist);
    text-align: center;
    font-size: 0.95rem;
    line-height: 1.8;
}

.colophon p {
    margin-bottom: 0.6rem;
}

.colophon-mark {
    font-family: var(--font-kr-display);
    font-size: 2rem;
    color: var(--bright-teal);
    margin-top: 1rem;
    letter-spacing: 0.3em;
}

/* ================================================
   FLOATING COMPASS + RADIAL MENU
   ================================================ */

.floating-compass {
    position: fixed;
    bottom: 28px;
    right: 28px;
    width: 48px;
    height: 48px;
    z-index: 1000;
}

.compass-button {
    position: relative;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--steel-blue);
    border: 1.5px solid var(--bright-teal);
    cursor: pointer;
    box-shadow:
        0 6px 20px rgba(0, 0, 0, 0.45),
        0 0 0 0 rgba(78, 205, 196, 0.4);
    transition: transform 300ms var(--ease-magnet), box-shadow 300ms var(--ease-magnet), background 300ms ease;
    z-index: 1002;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.compass-button svg {
    width: 30px;
    height: 30px;
    transition: transform 600ms var(--ease-magnet);
}

.compass-button:hover {
    background: var(--bright-teal);
    box-shadow:
        0 8px 26px rgba(0, 0, 0, 0.55),
        0 0 0 6px rgba(78, 205, 196, 0.14);
}

.compass-button:hover svg circle,
.compass-button:hover svg path {
    stroke: var(--deep-navy);
}

.floating-compass.open .compass-button {
    transform: rotate(135deg);
    background: var(--bright-teal);
}

.floating-compass.open .compass-button svg circle,
.floating-compass.open .compass-button svg path {
    stroke: var(--deep-navy);
}

.radial-menu {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    pointer-events: none;
}

.radial-link {
    position: absolute;
    top: 0;
    left: 0;
    width: 42px;
    height: 42px;
    margin: -21px 0 0 -21px;
    border-radius: 50%;
    background: var(--deep-navy);
    border: 1px solid var(--bright-teal);
    color: var(--chalk-white);
    text-decoration: none;
    font-family: var(--font-definition);
    font-size: 0.78rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: translate(0, 0) scale(0.4);
    opacity: 0;
    pointer-events: none;
    transition:
        transform 420ms var(--ease-magnet),
        opacity 320ms ease,
        background 240ms ease,
        color 240ms ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
}

.radial-link::after {
    content: attr(data-label);
    position: absolute;
    right: 54px;
    top: 50%;
    transform: translateY(-50%);
    font-family: var(--font-definition);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--metallic-silver);
    background: var(--deep-navy);
    padding: 0.25rem 0.55rem;
    border: 1px solid var(--slate-mist);
    white-space: nowrap;
    opacity: 0;
    transition: opacity 240ms ease;
    pointer-events: none;
}

.radial-link:hover {
    background: var(--bright-teal);
    color: var(--deep-navy);
    border-color: var(--bright-teal);
}

.radial-link:hover::after {
    opacity: 1;
}

.floating-compass.open .radial-link {
    opacity: 1;
    pointer-events: auto;
}

/* ================================================
   MAGNETIC PULL ANIMATION
   ================================================ */

.magnetic {
    opacity: 0;
    transform: translateX(-60px);
    transition:
        transform 700ms var(--ease-magnet),
        opacity 500ms ease;
    will-change: transform, opacity;
}

.magnetic.is-visible {
    opacity: 1;
    transform: translateX(0);
}

.collage-card.magnetic-card {
    opacity: 0;
    transition:
        opacity 700ms ease,
        box-shadow 500ms var(--ease-magnet);
}

.collage-card.magnetic-card.is-visible {
    opacity: 1;
}

/* ================================================
   KEYFRAMES
   ================================================ */

@keyframes spin-cw {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

@keyframes spin-ccw {
    from { transform: rotate(0deg); }
    to   { transform: rotate(-360deg); }
}

@keyframes spin-slow {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to   { transform: translate(-50%, -50%) rotate(360deg); }
}

.heading-compass {
    animation: spin-heading 36s linear infinite;
}

@keyframes spin-heading {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

@keyframes breathe {
    0%, 100% { transform: scale(1); filter: brightness(1); }
    50%      { transform: scale(1.015); filter: brightness(1.08); }
}

@keyframes bob {
    0%, 100% { transform: translateY(0); opacity: 0.8; }
    50%      { transform: translateY(6px); opacity: 1; }
}

/* ================================================
   RESPONSIVE
   ================================================ */

@media (max-width: 900px) {
    .folio {
        padding: 6vh 5vw;
    }

    .collage-container {
        height: auto;
        display: flex;
        flex-direction: column;
        gap: 1.2rem;
    }

    .collage-card {
        position: relative !important;
        top: auto !important;
        left: auto !important;
        width: 100% !important;
        height: auto !important;
        min-height: 160px;
        transform: none !important;
    }

    .floating-compass {
        bottom: 18px;
        right: 18px;
    }
}

@media (max-width: 600px) {
    .folio-title {
        font-size: clamp(2rem, 8vw, 3rem);
    }

    .folio-header {
        margin-bottom: 2.5rem;
    }

    .gak-char {
        font-size: clamp(6rem, 28vw, 14rem);
    }

    .invitation-subtitle {
        font-size: 1.1rem;
    }

    .compass-stage {
        width: 90vw;
        height: 90vw;
    }

    .ring-text-outer { font-size: 13px; }
    .ring-text-inner { font-size: 10px; }
}